They said that this game is as buggy as wotn,is that true?Does the game playable?

They have fixed some issues with the game and it's definately worth playing. It's better than WoTN imo. The only real bug I've encountered was an incorrect troop count that made it too difficult to fight that army but you could come back later and it might be different according to some reports. There are a lot of bugs in the form of spiders though.